How to setup ionic vanilla js project

am new to ionic framework , i follow to the installation tutorial on site ,

so i run this command :
npm install -g ionic

after that it ask me to try out ionic v4 i said yes , and when the setup completed of tabs template app it contain a lot of .ts extension files also inside looks like their is angular js in it

so questions is how can i configure project with vanilla js , i mean not everyone is familiar with angular or type script or vue etc not sure why by default ionic use angular js . default should be core vanilla js.

i know some what core js , jquery , es6, webpack 4 etc so can we use this with ionic or not